body {
    background-color: darkslategray;
    align-items: center;
}
#numbers {
    border-radius: 5px;
    border-color: transparent;
    width: 100%;
    height: 100%;
    background-color: aliceblue;
    font-size: 100%;
    font-family:'Times New Roman', Times, serif;
    text-emphasis-position:calc();
    text-align: right;
}
table {
    font-weight: bold;
    height: 100%;
    width: 100%;
}
#ac, .div, .mul, .sub, .add , .sev , .eight, .nine,
.four, .five, .six, .one, .two, .three, .enter, .zero, .dot{
    font-size: 20px;
    text-align-last: center;
    border-radius: 5px;
    width: 50px;
    background-color: aliceblue;
}
#ac:hover {
    background-color: aqua;
}
td:hover{
    background-color: aqua;
    cursor: pointer;
}
.enter:hover {
    background-color: green;
}
.enter:checked {
    background-color: red;
}
.external {
    display: flex;
    justify-content: center;
    height: 50%;
}
  
.internal {
    padding: 25px;
    align-items: center;
    background-color: aquamarine;
    width: 50%;
}

.heading {
    background-color: bisque;
}